Assighoe to



Jan. 10, i928. 1,655,828

F. R. WEAVER CUTTER Patented dan. l, i923, l

'FRANK Tnfwnavnnrfor:cninrom Wisconsin, Assrenon ro Wisconsin-"KNEE WORKS, inc., or Gunmen-Wisconsin, A oonrena'rion or Wisconsin..

' curr/nits i,

Appucanga sied rebrafa'ry a. i927.y 'sen-siam ineen.

K This invention relates to cutters' for ivood- 'Working inachineryand is more particularly concerned'ivith the provision of av noveltype d of nioulderhead. 'j A i Y' n flhe principal'objec't ofvniyyinvention .is to proyide in afhead'ot the'type referred to, wherein af plurality of bitsfo'tone pattern are'mounted in spaced relation abouti'the periphery of*v the head Witha 3lurality loi l0 bits oli' another patternY mountedbetween the first mentioned bits to make complementary cuts in the' Work,"k novel means for holding' the last'i'iientioned bits permitting therotation thereof in the plane of their operation to inoperative positions Whenever desired. as, for example, When the first mentioned bits are to be tracked and trued up. With the means employed'in accordance With my in- Y vention the rotary bits may beset accurately7 in their proper position; and the simple inatter'otloosening);` one nut sui'lices in the` retractinitjf ot' Aeach bit from.' its normalzcuttingposition; "andthe tightening of the fnt after the blad-e moved back to its normal position vservesto fasten the'jsame securely, no :resetting of the 'blade .being re- W Theseiaiid. other important objects andad- 0 vantages of ymy invention will be discussed quired as Was thecasefin otheriheads vvithv` in thefolloiving specification wherein refer-1 ence ismade te the accompanying drawings illustrating a'preferredembodiment. In the drawing;Y Figure lis a perspective view of a cutter embodying thegfeatures.

above referred to. y Y 'l Fig.v 2`is a sectional detail on a slightly enlarged scale/to show the clamping means :for the dove-tailed bits and to indicate thlJ capacity for endwisev and sidevvis'eradjustnient oit the bits. 2 2 of Fig. l; H

Figff is a sectional detail on` similar scale Vto shoiv the clampingrmeans for the other set of bits with which the presentinvention. isparticuiarly coiicerriech` and to indicate 'also the capacity for adjustmentiand theretractability of the bits'. view kis taken on the line 3%-3 ot 2; and

y Fig.: fijisja plan vieiv ofthe next bit of the saine 'set toV show hoW alternate bits oi this set'arefcaiited in y one direction Whileintermediate' onesuarecanted inthe other rectin. 1

rlhis view takenon line' "The'same' reference numerals are applied.'

tocorresponding partsthroug'hout the views.

f f'lhelmonlder head yshown-is equipped with twov sets'ot b itsior cutting the ogee curves and the intermediate groovein theedges of strips'used inl making windows and doors in sash W'orln'or in the making et cabinets and the likef The particular pattern or profile to be lcut is, however, of no yspecial importance, generally spealrinfn'and may be varied asrequired, although the present improveinentfvs" are particularly advantageous when embodied in amoulder head for the purpose referred to,'as will presently appear.v The head 'is indicated generally bythe reference numerate and has an opening 6 topermit the`inounting ott' the head on'aspindle in the usual' manner. `The head is equipped with Jfour dove-tailed bits designated by the reference numerals 7, and lfour plain bits designated yby theY reference numerals 8,- `The particular.numberof bits is, however7 of no special importance.v The bits 7 aremilled lengthwise oifthefouter face as indicated at 9 and are bevelled at the frontend as indicated at lOto make the cutting edge,tlie degrec., otbevel being predetermined according to the ydepth of thev cut-'and to secure the pjoper'shaped opgee'curves. Thebits 8 have .sidecuttingfedges 11' and peripheral cutting edges 12 to cut the `groove between the ogee curves. l` Thealternatebits havey their side "0f edges disposed. atene sideand the intermediatej bits have their side'1 cutting, edgesdisposed at the otherv side'to make'. a finishingrfy cut A-at the opposite sides of the groove. The bits are arranged on seats 13 andare serrated on the under face, as indicated rat lli, tomatch corresponding serra-v tions on the seats 1.3, the serrations being transverse, relative to the plane of operation ot' the head. Thus the bits? vmay be adjusted: endivis'efby entering theV Serrat-ions of the bits-in the proper serrations on the seats in an `obvious inanneigjandfthe'bits are furthermo'readjustable laterally in any 4position of endivise adjlustm'eirit bysliding the serrations ot the'bitslinftheserrations of the seats. rllhefendvvis'e' adjustment is forfvvear and to compensate 'or y grinding' of the bits, vWhile the lateraladjustinent is 'for .the purpose oi seats 13. The pivotal mountin of the bits permits oftheir being turned rom the operativeposition shown, into an inoperative the mounting of these bits and the means for clamping the same will also be described;

presently. From the description thus .far advanced it will appear'that theretracting of the bits 8 leaves the bits 7 -alone on the cuttingradius. It is therefore a simple matter 'to'track the bits when setting up the out` ter. This feature is, however, of special advantage in the matterof truingup the bits since it makes possible the use of a closed end stone, havingy the proiileto fit the end of the milled groove 9: lVhere the bits had a tooth 'extending lengthwise of the groove 9 to cut the groove between the ogee curves on the work, the matter of truing up the bits became very involved. An open-ended stone, the opening in 'the end of which accommodated the middle tooth referred tohad to be employed or else other equallyinvolved measures had :to be adopted to true up the bits. In the present `case the retractability of the intermediateplain bits eliminates the difficulties referred lto andthe bits are furthermore of a much less complicated pattern than was otherwise 'required for the production of the kind of lwork in question. There is obviously much less chance of 'cloggingthe bits where the pattern is as plainas in the Vpresent case.

Referring-howto Fig. 2v it will be observed that the bit 7 'illustrated issdove-tail'ed '0n its underv side, as. indicatedat 16, forclamping purposes. Apair'of side plates'17 serve `as clamping Y members and" have bevel faced edge portions 18 servingas jaws for oppositelyfengaging thedove-'tail 16 of thebit;l The plates 17 bear only'at 19against theopposite sides of the head 5 so as to have capacity for limited' rocking movement relative to the head, as requiredin the side to side adjustmentof thebit or blade. If desired a pair of pins 20 may be provided on the head to position each plate while permitting ofthe slight-rocking movement'referred to. The plates 17 are arranged toz be drawn together to clamp the bit and for this purpose a bolt 21 is provided, secured vas by meansof 'a pin 22in the head 5, and projecting through openings in they plates 17 for the reception of nuts 23-on the threaded extremities thereof. The tighteningE ofr the nuts 23 clamps the bit'with a vice-like grip between the jaws 18. The looseningof one of the companion nuts, accompanied by' the tightening of fthe other, and vice versa, will result in acorresponding adjustment either way of the bit, and-it will be held 'just as firmly in one position as in another.

Referring now to Figs. 3 and f1, `wherein` is illustrated the blade .holdingmeans with which the .present 'invention is more particularly concerned, it will be observed that the bits 8 are received in the recesses 15 between walls-24."A A-pair of "blocks 25 of dove-'tail form are received inopenings .26' of complementary form provided in the walls 24, the blocks projecting substantially half-way fromthe openings at the periphery of the head. The bit 8 is received between the blocks 25 on a bolt 27, the latter beinggreceived inregisteringopenings 28 and29 provided .in the two blocks. The opening 28`is threaded for the'threaded reception of the bolt127 .but the-bolt extends freely through the opening 29.- The blocks 25 are both. split.at-.the base portion, as indicated at `30, and arranged to be spread into holding.,engagement in the openingsl 2G such. as willV prevent endwise displacement of the blocks and Aa `resulting ,sidewise displacement of the .-bit.- Theblocks areb'othcounterbored, as indicated at 31, and receive tapered collets 32 which arepassed over the projecting ends of the bolt 27.7 Nuts 33 and`33 thread on the projecting ends of the bolt 27"and!jam against th-e collets 32. lVhen the-nuts are tightened. the blocks 25 are: drawn together into cla1nping-engagement .with the` opposite. sides ofthe bit'8 and,l at the same time, the blocks are spread byI` reason of vthe action of the; collets 32 so that the blocks are held. againstmovement in their` openingsj26. Obviouslyv the bit is.held in avery secure manner. When itis desired .to-turnl the bitfrom itscuttingposition to a retracted position, this is done simply by looseningthe nut 22 without disturbing. the nut. 33. This leaves-the block associated`withfthenut 33 wedged in its opening, whereas the other block-y is free in its openingand the bit, consequently, can be turned aroundrelativey to thebolt127. The reason for/threading the bolt 27 in. the opening;. 28, it is believed, will now be apparent. The only time the nut 33 vis loosened iswhen. thetwo blocks are to be moved together one way or anotherin: setting .the bit. However, once the bit has been' set the nut 33y is left tightened and only the .nut 33 is loosenedon the occasion of reti-acting the bit. After a bit is retractedit can be returned to its normal cutting position and clamped again in this position without necessitating. av resetting thereof, since the one block has-not changed its po.- sition` during-.the retracting of ythe bit but has remained'tightly wedged in itsopening.,

It wil-l be observed by comparison of Figs. 3 and 4 that the bits 8 are cantedso that the side cuttingpr edge 11. of vonepbit isidisposed! toward one sideoftheheadlwhile.

the sidecuttingedg'e 11`of thenext'bitof the same set, is disposed toward the .opposite side. This positioningof bits results-in a finishing cut at -both sides of the groove produced by the bits. The inner end face of the block 25, designated by the reference numeral 34, determines the cant of the bits in an obvious manner and I prefer to provide these parallel end faces on the two blocks by providing a single block from which the two blocks are to be formed, setting the block in the head in the openings 26, and milling through the block in the recess at the proper angle to cut the block in two and accordingly provide the end faces at the proper angle. Thus the cant of the bladeis positivelydetermined irrespective of any discrepancy in the milln ing of the openings 26 or in the forming of vthe blocks.

I claim 1. In a cutter, the combination of a head providing spaced walls thereon for ythe mounting of a blade therebetween, a blade, clamping blocks for holding said blade received in openings provided in said walls, a clan'iping bolt passing through said blocks and through the blade held therebetween, and nuts threaded on the opposite ends of said bolt and drawing the blocks together to clamp the blade therebetween.

2. A structure asset forth in claim l wherein at least one of said blocks is split to permit the spreading thereof into holding engagement in its opening.

3. In a structure as set forth in claim y1, wherein at least one of saidv blocks is split to permit the spreading thereof into holding engagement in its opening, the provision of means operated in the tightening of said nutsarranged to spread the block in its opening. f

4. In a cutter, the combination of a head providing spaced walls thereon for the reception of a blade therebetween, a blade received between said walls and arranged to project from the periphery of the head in operation, a pair of clamping blocks for oppositely engaging the blade and received in openings in said walls, at least one of said blocks being split whereby to permit the spreading thereof into holding engagement in its opening, a bolt passing' through said blocks and through the blade held therebetween, said bolt being threadedly received in the aforementioned split block, nuts threading on the opposite ends of said bolt arranged to draw the blocks together to clamp the blade therebetween, the split block being counter-bored at its outer end about the projecting end of the bolt, and a tapered collet received in said counter-bore behind the nut on said bolt whereby in the tightening of the same to spread said block into holding engagement in its opening.

5. A structure as set forth in claim 4 wherein the split block is of a dove-tail form and splitat the base of the dove-tail, the opening receiving said block being of complementary form to receive the base portion of the dove-tail block whereby the block serves not only to clamp the blade but to hold the same against lateral displacement and against turning.

6. In a cutter, the combination of a head providing spaced walls thereon for the re- Y ception of a blade therebetween, a blade disposed between the walls to project from the periphery of the head in operation, a'bolt for mounting said blade to permit rotation thereof in the plane of its operation from cutting position to an inoperative position, a pair of clamping blocks of dove-tail form received in openings of complementary form provided in said walls to permit opposite engagement of said blade, said blocks being split to permit the spreading thereof in their openings to hold t-he same in position, said bolt being received in registerlng openings in said blocks and having the opposite ends thereof threaded and projecting from the outer ends of said blocks, said blocks being counter-bored at their outer ends about the projecting ends of said bolts, tapered collets received in said counter-bores and `nuts ythreaded on the ends of said bolt arranged one of said blocks but passes freely through the opening in the other block for the pur pose specified.

8. A structure as set forth in claim 6 wherein the inner ends of said blocks which abut the opposite sides of the blade are disposed at an angle to the plane of operation of the head to correspondingly cant the blade heldtherebetween.

In witness of the foregoing I affix my Y signature.

FRANK R. WEAVER. 

